Item 7.01 Regulation FD Disclosure.



  On May 24, 2022, Summit Materials, Inc. (the "Company") issued a press release
announcing that it will host an Investor Day on Tuesday, May 24, 2022 beginning
at 9:00 am eastern time at which the Company will present and distribute an
investor presentation to provide updates on its Elevate Summit strategy, growth
drivers, ESG initiatives, as well as capital allocation priorities (the
"Investor Day Presentation"). A copy of the press release is furnished as
Exhibit 99.1 to this Current Report on Form 8-K (this "Form 8-K") and is
incorporated herein by reference. A copy of the Investor Day Presentation is
furnished as Exhibit 99.2 to this Form 8-K and is incorporated herein by
reference.

The information in this Form 8-K is being furnished and shall not be deemed
"filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), or otherwise subject to the liabilities of such
section. The information included in or referenced by this Form 8-K shall not be
incorporated by reference into any filing under the Securities Act of 1933, as
amended, or the Exchange Act, unless specifically incorporated by reference into
any such filing. This Form 8-K will not be deemed an admission as to the
materiality of any information included in or referenced by this Form 8-K that
is required to be disclosed by Regulation FD.

Item 9.01 Financial Statements and Exhibits.



  (d)  Exhibits

     Exhibit No.                                            Description

99.1                          Press Release of Summit Materials, Inc. dated May 24, 2022  .

99.2                          Summit Materials, Inc. 2022 Investor Day Presentation  .

104.1                       Cover Page Interactive Data File (embedded

within the Inline XBRL document)

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